Semicarbazide in Canadian bakery products.

Area of Science:

• Food Science
• Analytical Chemistry
• Food Safety

Background:

• Semicarbazide is a compound that can form from the decomposition of azodicarbonamide.
• Azodicarbonamide is widely used as a flour treatment agent in the baking industry.
• Concerns exist regarding the potential health effects of semicarbazide in food.

Purpose of the Study:

• To quantify semicarbazide levels in various bakery products.
• To assess the variability of semicarbazide concentrations within and between different products and batches.
• To investigate potential implications for the standardization of azodicarbonamide usage in baking.

Main Methods:

• Liquid chromatography-tandem mass spectrometry (LC-MS/MS) with isotope dilution methodology was employed for semicarbazide determination.
• Samples underwent hydrolysis in hydrochloric acid and derivatization with 2-nitrobenzaldehyde to measure total semicarbazide (free and bound).
• Eleven types of bakery products were sampled at three different time points from the same source.

Main Results:

• Semicarbazide levels ranged from not detected (<1 ng g(-1)) to 560 ng g(-1) across the analyzed bakery products.
• Significant variations in semicarbazide concentrations were observed, sometimes exceeding tenfold, even between batches of the same product.
• These findings indicate a lack of standardization in the addition of azodicarbonamide by many baking facilities.

Conclusions:

• The study highlights substantial variability in semicarbazide content in bakery products.
• The observed inconsistencies suggest non-standardized application of azodicarbonamide in commercial baking.
• Further research may be needed to establish regulatory limits and ensure consistent food safety.